Weighing-scales



UNITED STATES PATENT OFFICE.

JAMES P. HAGGETT, OF NE\V CASTLE, MAINE.

WElGHlNG-SCALES.

SPECIFICATION forming part of Letters Patent No, 256,892, dated April 25, 1882.

Application filed September ll, lSSl.

To all whom it may concern:

Be it known that I, JAIVIES P. HAGGETT, of New Castle, in the county of Lincoln, Stateof Maine, have invented a certain new and useful Improvement in VVeighing-Scales, of which the following is a description sufficiently full, clear, and exact to enable any person skilled in the art or science to which my invention appertains to make and use the same, reference being had tothe accompanying drawings, forming a part of this specification, in which- Figure l is a sectional side elevation; Fig. 2, a plan or top view of the indicator, and Figs. 3 and 4 views of the first and second dials.

Like letters of reference indicate corresponding parts in the different figures of the drawings.

My invention relates to that class of weighing-scales which are provided with automatic or self'registering mechanism; and it consists in a novel construction and arrangement of the parts, as hereinafter more fully set forth and claimed, by which a more effective device of this kind is produced than is now in ordinary use.

In the drawings, A represents the platform, B the standard, and G the beam, of the scale.

The standard B is provided with the rectangular hollow arm or case D, arranged in parallelism with the platform, and in this arm are journaled a series of wheels, E F G H, as seen in Figs. 1 and 2. These wheels intermesh through the medium of the small gear-wheels I J K, which are respectively mounted on the same shafts with the larger wheels, the shaft of the wheel E also carrying at its outer end the index finger or hand shown in Fig. 3, and that of the wheel G the hand shown in Fig. 4, the dials for the same being disposed on the front side of the arm or case D. (Represented in Fig. 1 as removed.)

The beam 0 is pivoted at L in the arm D, and carries at its outer end a vertically-arranged bar, M, the upper portion of which is serrated and constitutes a rack,which engages with the actuating-pinion Q of the registering mechanism, while the lower portion of the bar constitutes a shank, which passes through an aperture for that purpose in the bottom of the arm D, and is provided with a nut, N, at its (No model.)

lower end. The upper end of this bar is pro vided with a loop or book, 0, which hooks over the outer end of the scale-beam, which latter is provided with an upwardly-bent hook,f. A coiled spring, 0, acting expansively, is disposed around the har M, the lower end of the spring resting on the nut N, and its upper end abutting against the under side of the arm D, as shown in Fig. 1.

Horizontally arranged in the outer end of the arm D there is a shaft, P, provided with the small spur-wheel or gear Q, which intermeshes withthe serrated bar M. The shaft P is also provided with the loose spur-wheel or gear R, having an ordinary ratchet-and-pawl attachment, (1, the gear intermeshing with the wheel E, the shaft of which is also provided with retaining mechanism or an ordinary ratchet and pawl, d. The beam 0 is not necessarily notched or provided with figures, and has a counterbalance-nut, S, on its short arm for adjusting the scale. A vertically-arranged rod, T, is attached by its upper end to the short arm of the beam 0, its lower end being connected with the mechanism beneath the platform A, which may be of the ordinary description.

In the use of my improvement the article to be weighed is placed on the platform A, causing the rod T to be depressed or drawn down and the long arm of the beam 0 to be elevated. These movements communicate an upward motion to the bar M, the spring 0 being compressed as the bar rises, the pawl a slipping and the shaft 1? revolving without turning the wheel B. When the article being weighed is removed from the platform A the expansive action of the spring 0 will depress the outer end or long arm of the beam 0, the pawl a eugaging its ratchet, causing the wheel R to revolve, and through it communicating motion to the wheel E and the train of connectingwheels, the weight of the article being indicated by the hands on the dials in a manner which will be readily understood by all conversant with such matters without a more explicit description.

The wheel E, and through it the wheels F G H, being retained by the ratchet and pawl d, are not reversed in their movements by the reverse movement of the bar M, and hence at each weighing the hand on the first dial, Fig. 3, has to be moved back to its original position or starting-point by means of the flanges or wings on m, provided for that purpose, the hands of the (hills being retained on the pinions of their respective shafts by friction, thus enabling this to be readily accomplished.

From the foregoing it will be obvious that the weightof thearticle willbeprimarily shown on the dial of the wheel E, and that where several articles are weighed in succession the sum total or weight of all the articles will be shown on the second dial, the number of dials being multiplied to any extent necessary, and provided with such numerals .or other ch'aracters as may be desired. It will also be obvious that the spring 0 should be of such strength or so adjusted by the nut N as to render the scale accurate. The wheels E G are advanced and the hands moved in the direction indicated by the arrows in Figs. 3 and at on the downward movement of the bar M; but by reversing the pawl-and-ratchet mechanism the same may be made to occur on the upward movement of said bar, if desired, without departing from the spirit of my invention, the dials in that case being changed accordingly.

Having thus explained my invention, what I claim is- The combination of the weighing mechanism of a platform-scale, a registering mechanism therefor, a vertical bar composed of a rack which engages an actuating-pinion of the registering mechanism, and a straight shank continuous therewith projecting through a slot in the horizontal arm of the scale-frame, said bar being provided at one end with an adjustingnnt and at the other end with a loop adapted to hook over the outer end of the scale-beam, and a spring interposed between the nut and the said arm of the frame, substantially as described.

JAMES P. HAG IETT.

Witnesses:

WM. H. DIEHL, O. A. SHAW. 

